The website BandDirector.com has several videos recorded from the Michigan State University annual "Clarinet Spectacular" events. These two Ted Oien masterclasses are a great resource for any clarinetist thinking about taking orchestral auditions.
The first class, Orchestral Clarinet Repertoire Everyone Should Know features Ted Oien (principal clarinet of the Detroit Symphony) working with students on exerpts from Beethoven's Sixth Symphony and the Mendelssohn Scherzo.
Another class, Steps to Winning Your First Orchestral Audition, features Oien and Marlene Pauley (conductor and clarinetist with the St Paul chamber orchestra) in a great discussion about orchestral auditions. Topics include preparation for auditions, the importance of rhythm, and commonly requested orchestral excerpts. The class also includes an interesting discussion about bass clarinet auditions, including the Detroit Symphony audition that led to the hiring of Shannon Orme. For any aspiring orchestral clarinetist, this video provides invaluable advice on being proactive about your career, perseverance, and finding a career path.
BandDirector.com is difficult to navigate and the sound quality is lacking, but you can find more clarinet videos on the "Ensemble Videos" page, including a recital by MSU professor Caroline Hartig and several clarinet choir performances.